Roo Man

My Feedback: (1)

I have an Echo chain saw that will start when cold very easily but when hot it is almost impossible to start.

I have done the following:

Rebuilt the carb
Checked spark plug both when cold and just after running when hot to verify ignition is not breaking down. Has very strong blue spark.
Has good compression both hot and cold
Have tried starting fluid with no start
Have added oil to fuel to insure it was not partially siezing.

Any ideas would be appreciated.

Gary

Gizmo-RCU

My Feedback: (27)

I also have a small echo that I use for pruning, etc. never missed a lick. Extra oil will only foul the plug, bad idea, if it had a lube problem the extra oil will not help at this stage.
Because your problem occurs when the saw becomes heated from use when hot I suspect you have a fuel pressure problem caused by expanding fuel in an improperly vented tank. Check out the fuel
lines and gas cap to see if anything is plugged or crimped, if not, it is possible that your carb is defunct and needs a re-build as it is not regulating fuel flow under pressure? This will result in flooding.
Good luck!

Gizmo-RCU

My Feedback: (27)

Forgot....replace the plug with a new NGK, plugs do go bad and brake down when hot.

w8ye

My Feedback: (16)

The crankshaft seals could be bad and leak when the engine is warm

Roo Man

My Feedback: (1)

I played with it some more after my post and found that if I didn't choke it, it started, but pretty short test about 5-6 starts and restarts all worked. The reason I chocked it was before I rebuilt the carb, it had problems drawing fuel so always had to choke apparently with new carb kit it will not be necessary when hot.

Thanks for all your input.

Gary

Gizmo-RCU

My Feedback: (27)

Thanks,
I went to the shop this AM and checked out my Echo...non vented tank! They a great saws, wished they made bigger ones for my needs